72561118 has 16 divisors (see below), whose sum is σ = 124508160. Its totient is φ = 31068216.

The previous prime is 72561109. The next prime is 72561119. The reversal of 72561118 is 81116527.

It is a self number, because there is not a number n which added to its sum of digits gives 72561118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72561119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19923 + ... + 23281.

It is an arithmetic number, because the mean of its divisors is an integer number (7781760).

Almost surely, 2^72561118 is an apocalyptic number.

72561118 is a deficient number, since it is larger than the sum of its proper divisors (51947042).

72561118 is a wasteful number, since it uses less digits than its factorization.

72561118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911.

The product of its digits is 3360, while the sum is 31.

The square root of 72561118 is about 8518.2813994373. The cubic root of 72561118 is about 417.0946845090.

The spelling of 72561118 in words is "seventy-two million, five hundred sixty-one thousand, one hundred eighteen".